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        <identifier>oai:fra.repo.nii.ac.jp:02015898</identifier>
        <datestamp>2026-02-19T01:39:18Z</datestamp>
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          <dc:title>三重県英虞湾立神浦における一年生アマモ群落の構造と季節変化</dc:title>
          <dc:title>Structures and seasonal changes of annual Zostera marina population in Tategami-ura, Ago Bay, Mie Prefecture, central Japa</dc:title>
          <dc:creator>Abe, Mahiko</dc:creator>
          <dc:creator>1248</dc:creator>
          <dc:creator>阿部, 真比古</dc:creator>
          <dc:creator>90470137</dc:creator>
          <dc:creator>アベ, マヒコ</dc:creator>
          <dc:creator>Kawahara, Rie</dc:creator>
          <dc:creator>川原, 利恵</dc:creator>
          <dc:creator>カワハラ, リエ</dc:creator>
          <dc:creator>Yokota, Keigo</dc:creator>
          <dc:creator>横田, 圭五</dc:creator>
          <dc:creator>ヨコタ, ケイゴ</dc:creator>
          <dc:creator>Goto, Masaki</dc:creator>
          <dc:creator>後藤, 真樹</dc:creator>
          <dc:creator>ゴトウ, マサキ</dc:creator>
          <dc:creator>Kurashima, Akira</dc:creator>
          <dc:creator>倉島, 彰</dc:creator>
          <dc:creator>クラシマ, アキラ</dc:creator>
          <dc:creator>Maegawa, Miyuki</dc:creator>
          <dc:creator>前川, 行幸</dc:creator>
          <dc:creator>マエガワ, ミユキ</dc:creator>
          <dc:subject>Zostera marina; annual plant; population structure; seasonal change</dc:subject>
          <dc:description>This study clarified the structures and seasonal changes of the annual Zostera marina population from April 2003 to November 2004, growing at Tategami-ura, Ago bay, Mie prefecture. Productive structures showed the graminous types excluding flowering period (May-June). Biomass and shoot density reached maximum values in May-June. At that time, over 80% of shoots were flowering shoots. And then, all shoots were disappeared in summer. From October-November, a lot of seedlings recruited and grew to flowering shoots by next spring. Maximum daily net production showed 4.50 g m-2 day-1 in June, which was similar level to that of the perennial Zostera marina population. However, yearly net production (305.0 g m-2 year-1) showed lower than that of the perennial type. Yearly maximum biomass was 152.6 g m-2, and production/biomass (P / B) ratio was 2.0. It is necessary to more research in the production because the biomass and shoot density of the annual population verify drastically year to year.</dc:description>
          <dc:description>本研究では，2003年4月から2004年11月において三重県英虞湾立神浦に生育する一年生アマモ群落の構造と季節変動を明らかにした。生産構造は，開花期 (5～6月) を除いてイネ科型を示した。現存量およびシュート密度は5～6月に最大値を示し，密度の80%以上が花枝であった。また，夏季には全てのシュートが消失した。10～11月にかけては多くの実生が加入し，翌春までに生殖シュートへと生長した。6月に日純生産量は4.50 g m-2 day-1と最大値を示し，多年生アマモ群落と同程度であった。しかし，年間純生産量 (305.0 g m-2 year-1) は多年生アマモ群落よりも低かった。年間最大現存量は152.6 g m-2であり，年間純生産量と年間最大現存量の比 (P / B比) は2.0であった。一年生アマモ群落は現存量およびシュート密度が毎年大きく変動するため，生産量に関する研究をさらに進める必要がある。</dc:description>
          <dc:description>編集：水産大学校</dc:description>
          <dc:description>departmental bulletin paper</dc:description>
          <dc:publisher>水産研究・教育機構</dc:publisher>
          <dc:publisher>Japan Fisheries Research and Education Agency</dc:publisher>
          <dc:date>2025-12</dc:date>
          <dc:type>VoR</dc:type>
          <dc:format>application/pdf</dc:format>
          <dc:identifier>水産大学校研究報告</dc:identifier>
          <dc:identifier>1</dc:identifier>
          <dc:identifier>74</dc:identifier>
          <dc:identifier>9</dc:identifier>
          <dc:identifier>23</dc:identifier>
          <dc:identifier>Journal of National Fisheries University</dc:identifier>
          <dc:identifier>AN00124678</dc:identifier>
          <dc:identifier>0370-9361</dc:identifier>
          <dc:identifier>https://fra.repo.nii.ac.jp/record/2015898/files/fish-u_k_74_1_9.pdf</dc:identifier>
          <dc:identifier>https://doi.org/10.57348/0002015898</dc:identifier>
          <dc:identifier>https://fra.repo.nii.ac.jp/records/2015898</dc:identifier>
          <dc:language>jpn</dc:language>
          <dc:relation>fish-u_k_74_1_9</dc:relation>
          <dc:rights>open access</dc:rights>
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